Manufacturing Engineering Elevator Lift System Operation

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Bell Work ActivityPlease take out a sheet of paper and completethe following:

A. How many times have you walked up five flights of stairs? How many times have you walked up 10 or more flights of stairs?

B. Write a five-sentence essay about how you would feel if you were going to an important appointment on the 10th floor of a building, and upon your arrival, you found out the elevator was out of service.

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A. There are several important terms and definitions students need to know.

B. Complete the Elevator Lift System Matching Terms and Definitions handout.

C. Students may work in groups.

Warm-Up Activity Elevator Lift System Terms and Definitions

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Overview

• The impact of the Industrial Revolution and the evolution of technology in the 1800s gave designers the ability to construct buildings to greater heights—more than ever before.

• The construction of new “skyscrapers’’ would not have been possible without advancements in elevator lift technology.

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Theory of Operation of an Elevator Lift System • An elevator lift system consists of several

components and subsystems that work together to safely transport passengers within a building structure.

• The elevator car secures passengers for transportation. An electric motor is used to provide power to lift and lower the car.

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Theory of Operation of an Elevator Lift System (continued) • A cable system connects to the car on one end

and to a set of counter weights on the other end—this balances the passenger load.

• The braking system allows the car to stop between floors and is an important safety feature on all elevators.

• Computerized control systems prioritize and sequence passenger requests and give passengers the ability to control the operation of each elevator car.

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Elevator Lift System Terms

• Counterweight• Elevator car• Safety brake• Cable system• Electric motor• Sheave• Guide rails • Shock absorber

system

• Electromagnetic brake

• Computer control system

• Load sensor• Door system• Motion sensor• Safety governor

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Elevator Lift System Operational Layout

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Motor and controller Sheave

Counter weight

Cable assembly

Elevator car

Shock absorber

Guide rails